| 摘要 |
FIELD: instrumentation engineering. SUBSTANCE: analyzer of spectrum of electric signals has laser source of light, former of light beam, prism of total internal reflection which reflecting face carries film of magneto- optical material, polarizer, Fourier lens and photoregistration system arranged in series in path of light beam, photoregistration system located in focal plane of Fourier lens, magnetic tape with system of pulling and recording touching film of magneto-optical material. Analyzer has switch for orthogonal change of polarity placed between source of light and film of magnetooptical material and light beam interrupter located between source of light and photoregistration system, control unit connected to switch, interrupter and output polarizer which is manufactured for switching over of passed polarization in step with polarization converter. Light beam interrupter interrupts luminous flux at moments of polarization switching over. Control unit provides for synchronous switching over of input and output polarization and interruption of light beam. Amplitude-frequency characteristic of film of magneto-optical material depends on polarization of incident light. Growth of intensity of refracted beam with growth of frequency of signal for one polarization recorded on magnetic tape is accompanied by decrease of intensity for the other polarization. Signal is partially read with one polarization and its reading is continued with other polarization. EFFECT: enhanced operational stability and reliability. |
